/Engine/Source/Runtime/SlateCore/Public/Application/SlateWindowHelper.h
Checks whether the given collection of windows contains the specified window.
true if the collection contains the window, false otherwise.
static bool ContainsWindow ( const [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) >> & WindowsToSearch, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > & WindowToFind )